dev-cpp-users

[Dev-C++] function errors

[Noorez K. <coo...@ho...>]

#include <iostream>
#include <conio.h>
using namespace std;

namespace myf
{
    void wait(char message[], char contin)
    {
        if(contin == '') //make sure that contin is not blank
        {
            //if it is...
            cout << "Press any key to continue...";
            while( !kbhit() )
            {
            }
            return;
        }
        cout << message << endl; //do what is told
        char get;
        while(1) //loop till we get the correct value
        {
            get = getch(); //'empty character constant' error
            if(get == contin)
            {
                return;
            }
        }
    }//end wait()
}//namespace myf


I am trying to put this function into a library of other functions of my own 
but I'm getting a compile error on the marked line.

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Re: [Dev-C++] function errors

[Per W. <pw...@ia...>]

I think you have picked the wrong line for the error. You have the error
in:

if(contin =3D=3D '')

You might specify an empty string with "" but you may not specify an empty
character with '' - a character is always a character - just as a number
always have at least one digit. There are actually multi-character
constants too, i.e. '\r\n' is a dual-character constant. However, these
kind of character constants are a bit special and normally requires
knowledge about byte-order of the machine to be used safely.

You might write one of:
if (contin =3D=3D '\0')
or just:
if (contin =3D=3D 0)

to test for a "null" character.

/Per W

On Wed, 21 Jul 2004, Noorez Kassam wrote:

> #include <iostream>
> #include <conio.h>
> using namespace std;
>
> namespace myf
> {
>     void wait(char message[], char contin)
>     {
>         if(contin =3D=3D '') //make sure that contin is not blank
>         {
>             //if it is...
>             cout << "Press any key to continue...";
>             while( !kbhit() )
>             {
>             }
>             return;
>         }
>         cout << message << endl; //do what is told
>         char get;
>         while(1) //loop till we get the correct value
>         {
>             get =3D getch(); //'empty character constant' error
>             if(get =3D=3D contin)
>             {
>                 return;
>             }
>         }
>     }//end wait()
> }//namespace myf
>
>
> I am trying to put this function into a library of other functions of my =
own
> but I'm getting a compile error on the marked line.
>
> _________________________________________________________________
> Take charge with a pop-up guard built on patented Microsoft=AE SmartScree=
n
> Technology
> http://join.msn.com/?pgmarket=3Den-ca&page=3Dbyoa/prem&xAPID=3D1994&DI=3D=
1034&SU=3Dhttp://hotmail.com/enca&HL=3DMarket_MSNIS_Taglines
>   Start enjoying all the benefits of MSN=AE Premium right now and get the
> first two months FREE*.
>
>
>
> -------------------------------------------------------
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[Dev-C++] CMYK Macro problems

[Jeremy A. <je...@ar...>]

There is a problem with the CMYK macros in wingdi.h as supplied with 
DevC++  4.9.8.10

The DevC++ version defines a different byte order to Microsoft

// DEV C++ Version

#define GetCValue(cmyk) ((BYTE)(cmyk))
#define GetMValue(cmyk) ((BYTE)((cmyk)>> 8))
#define GetYValue(cmyk) ((BYTE)((cmyk)>>16))
#define GetKValue(cmyk) ((BYTE)((cmyk)>>24))
#define CMYK(c,m,y,k) 
((COLORREF)((((BYTE)(c)|((WORD)((BYTE)(m))<<8))|(((DWORD)(BYTE)(y))<<16))|(((DWORD)(BYTE)(k))<<24)))

// Microsoft VC++ 6.0 version

/* Macros to retrieve CMYK values from a COLORREF */
#define GetKValue(cmyk)      ((BYTE)(cmyk))
#define GetYValue(cmyk)      ((BYTE)((cmyk)>> 8))
#define GetMValue(cmyk)      ((BYTE)((cmyk)>>16))
#define GetCValue(cmyk)      ((BYTE)((cmyk)>>24))
#define CMYK(c,m,y,k)       
((COLORREF)((((BYTE)(k)|((WORD)((BYTE)(y))<<8))|(((DWORD)(BYTE)(m))<<16))|(((DWORD)(BYTE)(c))<<24)))

Re: [Dev-C++] CMYK Macro problems

[Scott S. <age...@co...>]

Fill out a bug report at sourceforge.net.
Jeremy Ardley wrote:

> There is a problem with the CMYK macros in wingdi.h as supplied with 
> DevC++  4.9.8.10
>
> The DevC++ version defines a different byte order to Microsoft
>
> // DEV C++ Version
>
> #define GetCValue(cmyk) ((BYTE)(cmyk))
> #define GetMValue(cmyk) ((BYTE)((cmyk)>> 8))
> #define GetYValue(cmyk) ((BYTE)((cmyk)>>16))
> #define GetKValue(cmyk) ((BYTE)((cmyk)>>24))
> #define CMYK(c,m,y,k) 
> ((COLORREF)((((BYTE)(c)|((WORD)((BYTE)(m))<<8))|(((DWORD)(BYTE)(y))<<16))|(((DWORD)(BYTE)(k))<<24))) 
>
>
> // Microsoft VC++ 6.0 version
>
> /* Macros to retrieve CMYK values from a COLORREF */
> #define GetKValue(cmyk)      ((BYTE)(cmyk))
> #define GetYValue(cmyk)      ((BYTE)((cmyk)>> 8))
> #define GetMValue(cmyk)      ((BYTE)((cmyk)>>16))
> #define GetCValue(cmyk)      ((BYTE)((cmyk)>>24))
> #define CMYK(c,m,y,k)       
> ((COLORREF)((((BYTE)(k)|((WORD)((BYTE)(y))<<8))|(((DWORD)(BYTE)(m))<<16))|(((DWORD)(BYTE)(c))<<24))) 
>
>
>
>
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Re: [Dev-C++] CMYK Macro problems

[Per W. <pw...@ia...>]

Note that it is MinGW that is the Win32 port of the compiler. Dev-C++ is
just a front-end.

/Per W

On Wed, 21 Jul 2004, Scott Simontis wrote:

> Fill out a bug report at sourceforge.net.
> Jeremy Ardley wrote:
>
> > There is a problem with the CMYK macros in wingdi.h as supplied with
> > DevC++  4.9.8.10
> >
> > The DevC++ version defines a different byte order to Microsoft
> >
> > // DEV C++ Version
> >
> > #define GetCValue(cmyk) ((BYTE)(cmyk))
> > #define GetMValue(cmyk) ((BYTE)((cmyk)>> 8))
> > #define GetYValue(cmyk) ((BYTE)((cmyk)>>16))
> > #define GetKValue(cmyk) ((BYTE)((cmyk)>>24))
> > #define CMYK(c,m,y,k)
> > ((COLORREF)((((BYTE)(c)|((WORD)((BYTE)(m))<<8))|(((DWORD)(BYTE)(y))<<16))|(((DWORD)(BYTE)(k))<<24)))
> >
> >
> > // Microsoft VC++ 6.0 version
> >
> > /* Macros to retrieve CMYK values from a COLORREF */
> > #define GetKValue(cmyk)      ((BYTE)(cmyk))
> > #define GetYValue(cmyk)      ((BYTE)((cmyk)>> 8))
> > #define GetMValue(cmyk)      ((BYTE)((cmyk)>>16))
> > #define GetCValue(cmyk)      ((BYTE)((cmyk)>>24))
> > #define CMYK(c,m,y,k)
> > ((COLORREF)((((BYTE)(k)|((WORD)((BYTE)(y))<<8))|(((DWORD)(BYTE)(m))<<16))|(((DWORD)(BYTE)(c))<<24)))
> >
> >
> >
> >
> > -------------------------------------------------------
> > This SF.Net email is sponsored by BEA Weblogic Workshop
> > FREE Java Enterprise J2EE developer tools!
> > Get your free copy of BEA WebLogic Workshop 8.1 today.
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> > https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
> >
>
>
>
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